Improvement iis



6., L. KEMPF.

PHOTOGRAPHIU PLATE-HOLDER.

N. 188 377, Patented March 13, 1877.

WITNESSES NPEFERS. EHOTO-LITHOGRAFHEE WASHXNGTON. D. C.

UNITED STA ATENT QFFIon CHARLES L. KEMPF, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN PHOTOGRAPHlC-PLATE HOLDERS.

Specification formingpart of Letters Patent No. 1883713. dated March 13,1877; application filed December 11, 1876.

To all whom it may concern:

Be it known that 1, CHARLES L. KEMPF, of Brooklyn, in the county ofKings and State of New York, have invented a new and useful Improvementin Photographic-Plate Holders for Cameras, of which the following is aspecification Figure 1 is a front view of my improved holder open, andparts being broken away to show the construction. Fig. 2 is a verticalsection of the same, taken through the line or at, Fig. 1. Fig. 3 a isdetail section of the kitframe for glass plates, showing one of thecorners. Fig. 4 is a detail view of one of the double reversible cornersfor the main frame. Fig.

5 is a detail section of the ferrotype kit-frame.

Similar letters of reference indicate corresponding parts.

The object of this invention is to furnish an improved holder forphotographic plates, which shall be so constructed as to enable thesolution to be saved, and at the same time to protect the said framefrom being destroyed by the solution.

The invention consists in the double reversible corners provided withthe rabbet along their inclined edges, the groove along their lowerflange, the rib, the projection, and the spout, to adapt them to receiveand carry off the solution; in the kit-frame corners, provided with therabbet along their inclined edges, the grooves along both flanges, theribs, and the projections at the ends of the grooves, in combinationwith the tubes passing through the angles of the said kit-frame; in theferrotype kit-frame, made with the rabbet, the grooves, and theperforated ribs, and provided with the tubes; and in the curvedsolutionbottle, provided with a mouth at each end, in combination withthe recessed bottom bar of the frame, and with the two corners, ashereinafter fully described.

A is the main frame, which is provided with a door, B, and a slide, 0,in the usual way. D are the upper corners, which are made in the usualway. E are the lower corners, which are made with a rabbet, 0 alongtheir inclined edges. Along the lower flange of the its end. which doesnot project entirely across said groove, a space heingleft for thesolution to flow around it.

From the bottom of the groove 6 a hole leads down through a projection,0 upon the lower side of the corner E, and which serves as a spout toconduct the solution into the mouth of the bottle F. With thisconstructzon the solution that runs down the side edges and face of theplate runs down the rabbet 6 into the groove e and the solution thatruns along the bottom edge of said plate passes over the rib e strikesagainst the projection 6 and drops down into the groove 6 From thegroove 6 the solution flows into the bottle F without having touched themain frame A. The bottle F is made curved, and with a mouth at each end,so as to receive the solution from each of the corners E. The bottle Fis placed in a recess in the bottom bar of the frame A, and is coveredwith a door, H, to prevent any light from passing in through or aroundsaid bottle. The knobs I upon the corners D E enable the kit-frame G orplate to be reversed when desired. J are the corners for the kit-frameG, which are made with a rabbet, 1, along their inclined side, with agroove, 2, along the flange of the two sides, with low ribs Sacross theends of the grooves 2, and with projections 4 upon the outer sides ofthe grooves 2, higher than, and at alittle distance from, the ribs 3.From the angle of the corners J small tubes 5 lead out diagonallythrough the angles of the frame G to conduct the solution to the cornersE, whence it flows into the bottle F. G is the kit-frame for glassplates, which need to be supported only at the corners, as they are notliable to spring.

For ferrotype-plates, which must be supported all along their edges, thekit-frame K is used. The shoulder of the frame K, upon which the platerests, has a rabbet, k formed in it to receive the solution from theface of the plate, and conduct it to the lower corners of said frame.The inner edges of the frame K have grooves k formed in them to serve aschannels to conduct the solution to the lower corners of the frame. Theedges of the plate restagainst ribs k formed across the grooves W, andwhich have cavities left between them and the bottoms of the saidgrooves, to allow the solution to flow through. The corners of theframeK have small tubes Mplaced in them diagonally, through which thesolution flows into the corners J or E, and passes thence to the bottleF.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The double reversible corners E, provided with therabbet 0 along their inclined edges, the groove 0' along their lowerflange, the rib e, the projection e, and the spout e, to adapt them toreceive and carry 0!! the solution, substantially as herein shown anddescribed.

- 2. The kit-frame corners J, provided with the rabbet 1 along theirinclined edges, the grooves 2 along both flanges, the ribs 3, and

the projections 4 at the ends of the grooves 2, in combination with thetubes 5, passing through the angles of said kit-frame, substantially asherein shown and described.

3. The ferrotype kit-frame K, made with the rabbet k, the grooves k, andthe perforated ribs kfland provided with the tubes k, substantially asherein shown and described.

4. The curved solution-bottle F, provided with a month at each end, incombination with the recessed bottom bar of the frame A, and with thetwo corners E, substantially as herein shown and described.

CHARLES L. KEMPF.

Witnesses:

JAMES T. GRAHAM, O. Snnuwrcx.

